Case-it Locker Ringer Accessory Presentation Binder with 1-Inch O-Rings, Black, PRE-02 (Pink) Ringer binder, 1-Inch binder that hooks into the Locker Binder system Sturdy water-resistant fabric with bound edges Perfect for middle school, high school, college students studying multiple subjects Like having a portable locker - bring your files on the road Available in a variety of colors, mix and match with Locker Binder System insert accessories